Triple-Mode upconversion emission for dynamic multicolor luminescent anti-Counterfeiting

Lanthanide (Ln3+) luminescent materials play a crucial role in information security and data storage owing to their excellent and unique optical properties. The advances in dynamic colorful luminescent anti-counterfeiting nanomaterials enable the generation of a high-level information encryption. In this work, a superior thermal, optical wavelength and excitation power triple-mode stimuli-responsive emis-sion color modulation is demonstrated in a lanthanide-doped nanostructured luminescent material. The plentiful emission colors are manipulated by modulating the composition of a fluoride core-shell nanos-tructure with different Ln3+ at different doping concentrations. The nanomaterials display remarkable excitation wavelength/power-dependent color change, along with temperature-dependent color varia-tion in the range from 298 K to 437 K, with a good relative sensitivity Sr of 1.1387% K-1 at 398 K. The universal optical modulation, combined with the excellent optical and structural stability of the lumines-cent nanoparticles, renders many advantages for the anti-counterfeiting application. This work explores a universal strategy for the manipulation of triple-mode stimuli-responsive dynamic luminescence and demonstrates its good potential for anti-counterfeiting application.(c) 2023 Elsevier Inc. All rights reserved.

Automated summary

Lanthanide (Ln3+) luminescent materials with excellent optical properties play a crucial role in information security and data storage. The advances in dynamic colorful luminescent anti-counterfeiting nanomaterials enable high-level information encryption. This work demonstrates a superior triple-mode stimuli-responsive emission color modulation in a lanthanide-doped nanostructured luminescent material, which shows remarkable excitation wavelength/power-dependent color change and temperature-dependent color variation. The universal optical modulation and structural stability of the nanoparticles have advantages for anti-counterfeiting applications.